Characterization of yeast extract co-product bioethanol from empty palm oil bunchMuhamad Sahlan, Charion Gibreth Hannes, Yanni Sudiyani, Heri Hermansyah and Anondho WijanarkoE3S Web Conf., 67 (2018) 03039DOI: https://doi.org/10.1051/e3sconf/20186703039